"Petal Effect" on Surfaces Based on Lycopodium: High-Stick Surfaces Demonstrating High Apparent Contact Angles

被引：133

作者：

Bormashenko, Edward ^{[1
,2
]}

Stein, Tamir ^{[1
,2
,3
]}

Pogreb, Roman ^{[1
,2
]}

Aurbach, Doron ^{[3
]}

机构：

[1] Ariel Univ, Ctr Samaria, Res Inst, Fac Appl Phys, IL-40700 Ariel, Israel

[2] Ariel Univ, Ctr Samaria, Dept Chem & Biotechnol Engn, IL-40700 Ariel, Israel

[3] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 14期

关键词：

WENZEL WETTING TRANSITION; ROUGH SURFACES; LOTUS; DROPLETS; BEHAVIOR; POLYMER; STATES;

D O I：

10.1021/jp900594k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Wetting properties of lycopodium-based surfaces are reported. The surfaces demonstrate high apparent contact angles accompanied by high adhesion of water droplets, similar to the recently reported biological interfaces (rosea Rehd) showing the "petal effect". Apparent contact angles depended strongly on the droplet volume. Vertical vibration of droplets deposited on the lycopodium-based reliefs promoted wetting transition. Semiquantitative analysis of the observed wetting transition taking into account the hierarchical topography of the relief is presented. We relate the high adhesion of droplets to the partial filling of pores constituting the relief.

引用

页码：5568 / 5572

页数：5

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